Boat.



n.1. NAGEL.

BOAT.

APPLICATION min JUNE 6, |911.l

INVENTOR ATTonNEY Patented Feb. 12, 1918.

WITN ESSES drawings, and claims,

HERMAN J'. NAGEL, 0F ALLIANCE, OHIO.

BOAT.

Specification of Letters''atcnt.

Patented Feb. i2", 191e.

Application filed June 6, 1,917. Serial No. 173,177.

To aZZ whom it may concern.'

Be it knownthat L'HERMAN J. NAGEL, a citizen 'of the United States, residing at Alliance,` in the county of Stark and State of Ohio, have invented certain new and useful Improvements in Boats, of which the following is a specification.

This invention relates to an improvement in bats, and more particularly to a hull construction to be embodied in the building of a boat or ship.

An object of my invention is to provide a hull construction which takes advantage of the displacement principle of boat building to use the water of notation to stabilize or ballast the ship or boat.

A further object resides in forming and .designing the ,hull in suoli a way that the speed of the ship or boat will increase due to lessening of the displacement and a better distribution of thel working load upon the propeller:

A still further object is to s0 construct the hull that the provision of the water ballast and the accomplishment of the object as herein before mentioned will place a quantity of water at such a point that the boiler and engine rooms, and other spaces Within the hull of the vessel, will be cooled.

Yet another object lies in providing gate or valve means t0 govern and controltthe degree in which the structure of my invention is to be permitted to be operative.

vWith the above and other objects iaview,

which will be 1n part described and in part understood from the specification, and my invention consists in`certa1n novel features of construction and combinations of parts which will be hereinafter fully set forth. In the drawings Figure l is a view in elevation of the hull of a ship or boat and with parts in section to illustrate one adaptation of my inventi'on;

Fig. .2 is a stern end view of a hull with the invention embodied therein;

Fig. 3 is a fragmcntar view similar to Fig. L), showing a modifie( construction;

Fig. 4 shows one adaptation of the invention in conjunction with a twin screw vessel;

Fig. 5 is a view similarto Fig. 3 illustrating a modified construction;

Fig. 6 is a fragmentary view showing yet another modification; and,

Fig. 7 is a detailed sectional View showing one means which might be employed to control the degree of operativeness of the structureu which view is taken onhthe line 7--7 of Fig. 1.

My invention is applicable to practically any type of ship or boat, and might even be' applied in conjunction with a paddle wheel boat, although it is perhaps particularly adaptable in conjunction with screw propelled boats. In the present disclosure,-

the hull l of the boat is shown as beine* of that type having a more or less rounded and`ll undercut stern, although I desire to have it understood that the invention is equally adaptable for application with a pointed stern or a transom stern boat 0I' ship. As is illustrated, the rudder 2 is mounted in the undercut formation of the stern of the boat, and the propeller 3 is also embraced within the outline of the boat, the rudder land wheel being thus so disposed that they are protected by the keel of the boat. A hollow and substantially 'tubular member 4 is mounted and built in the hull l of the boat or shipand has the forward end thereof raised somewhat Vand opening through the hull below the water line, the remaining end being inclined downwardly and rearwardly to open through the hull as shown at 5. By arranging the tubular member in this way, it extends substantially parallel with the keel of the boat, or in line with the direction of travel, and at the same time has the forward end elevated and the rear end opening just slightly above the keel. The chamber is constructed toV have both ends thereof open and thus the water of liotation can fill within the tube and will iow therethrough when the bat is in motion.

It is preferable that the propeller 3 be carried by the propeller shaft 6 in such relation that it works at the lower end of the tubular chamber 4, or adjacent thereto. In Fig. 2 I have illustrated the propeller as working directly centrally behind the open rear end of the chamber 4, and in this relative disposition of the parts, perhaps the best action is accomplished, although as the description progresses it will be seen that other adaptations might be resorted to.

In they use of a vessel hull constructed` after the manner of my invention, as the motor ship is launched, the forward and rear ends of the chamber 4 will be submerged and Water will be contained therein in a column or pillar. lVater pillars will thus be provided in the hull below Ythe water line, and this column or pillar of water acts to stabilize the boatv and also draws and holds the center of Igravity down within the hull. By raising the chamber in the manner as set forth and then disposing the propeller as is stated, the propeller works more evenly as a greater volume of water is provided and due to the fact that the pillar or column moves through the chamber when the propeller is operating or when the boat is in l motion, a substantially even pressure upon the propeller blades is attained. Further than thi's, the formationof the ch. mber and the angular disposition -of the sax e, in the manners heretofore set forth, will change the hull design to such an extent that a's the boat is moyed forward, the hull will be lifted. As the chamber is extended for a considerable distance throughout the length upon each side of the propeller;

of the hull of the boat or vessel, and a comparatively large volume of water 1s accommodated, it will be appreciated that the engine roc-m or other compartment within the hull of the boat will be cooled, and that the circulation of thel water through the chamber. will act to draw olf the heat from the campartments within the hull. l

As has been stated, the arrangement of the parts might be varied, and. in Fig. 3 I have illustrated the propeller as working at substantially the same position as is shown in Fig. 2, but here two' tubular members 7 and 8 are provided, one being positioned These chambers might be brolufht in,closel adjacent -the propeller shacft or move toward the side of the hull, and it will be seen that in this way the balance of the water columns could be more evenly distributed and could be thrown to act at a greater 4distance from the center of gravity on each side of the keel, to thus accomplish greater leverage in the righting of the hull when the same rolls, or to hold the hull against rolling. In Fig. 4 I have illustrated an adaptation in which twin propellers are employed and a single chamber placed between the propellers is used. If desired, two chambers might be provided so that each of the propellers 9 and 10 would work adjacent the open lower end of one of the chambers, but in the present adaptation I have shown the chamber 12 as opening substantially centrally between the propellers.

In the ldisclosure as shown in Fig. 5, I have illustrated an irregularly shaped chamber, and while this chamber partakes out l means does not form a of a flat elliptical formation incross section, it will be evident that the cross sectional desi n of the chamber might be varied to taxe a number of other forms and-that the object and purpose of the invention would yet be accomplished. n One changek in the cross sectional form of the chamber, which incorporates Asubstantially a combination of the chamber 11 as shown in Fig. 5 with the chamber 4 illustrated in Fig. 2, is disclosed in Fig. .6, and as has been stated, other changes in the formation and design ofthe chamber might be resorted to.

While the structure as herein before described will operate efficiently in that the water can flow into and through the tubular chamber, it is perhaps advisable that valves be provided in the ends of the tubular chamber as shown at 13 and 14. The valves 'in the head and in the stern ends of the chambers can be regulated independently of each other, or might be connected to be simultaneously opened and closed, and to accomplish operation of the valves, the gears 15 are provided .on the valve stems to mesh with gears 16 carried by the shafts 17. these shafts to be rotated in any desired and suitable lmanner. By constructing thel valves substantially after the manner shown in Fig. 7, when they are brought to the closed relation they will present substantially fluid tight bulk-heads across the ends of the tubular chamber, and thus if the valve inthe head end of the chamber be opened and the stern valve be closed, the chamber will contain a passive water column, which acts as a ballast for the ship; and atgthe same time, this setting of the valve will havea further advantage in that the hull will offer greater resistance to passage through the water and consequently the boat can be brought to a quicker stop. 0n the other hand` if the Yfrontend rear valves are closed, the chambers will carry a water column as ballast` which column will be entirely independent of the main volume of the water of flotation, and also `when the two valves are closed provision might be made to exhaust the liquid contents of the chamber, however. as such part of my invention, it is not here shown. i

From the foregoing it will be seen that. a construction is provided which is .einbodied in the hull as the same is built.l or which might le built into old hulls. and which accomplishes the purposes and objects as set forth above, and also it will be'notcd that the water column passing throughthe .chamber 'will give greater efficiency to the lcertain specific adaptations. it will be apparent that a number of changes and modi' neeaeee cations from the structure herein disclosed might be resorted to, and hence I wish to be limited only to such points as may be set forth in the claims.

l. A boat comprising a hull having a tubular chamber built therein to rise in a gradual incline from the stern to the bow end and having the ends thereof opening 'below the water line ofthe hull, and means to be set to close the ends of the-chamber.

2. A boat including a hull having driving means of the screw type, achamber of sub stantially tubular form arrangedwithin the hull to have both of its ends o en below the water line and having one en opening adjacentthe propeller. and means to be set to close the ends of the chamber.

v3. A boat including a hull havingdriving means of the screw propeller type a chamber of substantially tubular form built into the hull to open at the stern adjacent the propeller and toeXtend upwardly in a gradual incline to open Vadjacent the bow of the hull below the water line, and means to close the tubular chamber against the passage of water therethrolwh.

4. A boat including a hull having propulsion means of the screw t pe arranged to propel the boat by acting upon the water of flotation, a substantially tubular and open ended chamber mounted within the hull'I to extend substantially throughout the length thereof with the stern end openinr adjacent the propeller from which point the tubular chamber is extended in a gradual incline upwardly to have the forward end open ad- 'acent the bow of the hull below the water ine, velvet: mounted in the forward and stern ends of said tubular chamber, and means by which said valves are adjusted to the opened and closed positions.

In testimony whereof. I aix my signature in presence of two witnesses.

HERMAN J. NAGEL.

Witnesses:

E. E. DAvIs, 'Wan M. ROACH.

Genies of this patent may be obtained for ive cents each. by addressing; the "Commissioner yat? Entente,

Washington, D. C. 

